Área de vida de Cistothorus platensis (Aves: Troglodytidae) no Cerrado brasileiro

Fujikawa, Aline; Tubelis, Dárius Pukenis

doi:10.1590/1678-4766e2020006

Cited by 3 publications

(5 citation statements)

References 35 publications

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“…The range of Grass Wrens extends from Tierra del Fuego to Mexico, where they inhabit tropical and temperate grasslands, marshes, and bogs from sea level up to 4000 m asl (Ridgely and Tudor 1989, Chesser et al 2021, Remsen et al 2021. Grass Wrens are small (~9 g) insectivorous passerines, predominately resident, and socially monogamous (Llambias et al 2018, Zarco and Llambı ´as 2018, Fujikawa and Tubelis 2020. Only males develop complex songs used during courtship and agonistic interactions (Kroodsma et al 1999(Kroodsma et al , 2002.…”

Section: Methodsmentioning

confidence: 99%

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Structure and organization of songs of south‐temperate Grass Wrens ( Cistothorus platensis )

Coria

Rendall

Ros

et al. 2022

J of Field Ornithology

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Studies of geographic variation in bird song can provide important insights into vocal evolution. An intraspecific approach, focused on a single species with a broad distribution, can be particularly helpful in understanding the diverse selective pressures on the characteristics of songs and singing behavior. Grass Wrens (Cistothorus platensis) are one such species, inhabiting tropical and temperate grasslands across the Neotropics. We studied Grass Wrens in Mendoza, Argentina, to determine the structure, organization, and delivery of their songs, song repertoire sizes, and patterns of song sharing among males in a resident, mainland south-temperate population. Over two breeding seasons, we recorded and analyzed 27,795 songs from 29 color-banded males. Songs of male Grass Wrens contained a few, low-volume introductory notes typically followed by one, but sometimes more, syllable types repeated as a trill. Males often repeated a sequence of two or three different song types (A-B-C, A-B-C, . . .) several times before switching to a different sequence (D-E-F). Syllable and song type sharing was high among males. The size of recorded syllable and song type repertoires of individual males varied with sampling effort. The introduction of new syllable or song types by males slowed, but did not reach asymptotes, with increasingly large samples of recordings. Many of these patterns are consistent with previous reports for Grass Wrens and other Cistothorus wrens, possibly representing core features of song design in this species group. Our results concerning song sharing among males in a resident population are also consistent with a previous proposed relationship between male song sharing and breeding-site fidelity. In the latter respect, Grass Wrens of Central and South America are more similar to Marsh Wrens than Sedge Wrens of North America, providing support for a recently proposed split between Grass Wrens and Sedge Wrens formerly considered conspecific.

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Section: Methodsmentioning

confidence: 99%

“…Grass Wrens are small (~ 9 g) insectivorous passerines, predominately resident, and socially monogamous (Llambias et al. 2018, Zarco and Llambías 2018, Fujikawa and Tubelis 2020). Only males develop complex songs used during courtship and agonistic interactions (Kroodsma et al.…”

Section: Methodsmentioning

confidence: 99%

Structure and organization of songs of south‐temperate Grass Wrens ( Cistothorus platensis )

Coria

Rendall

Ros

et al. 2022

J of Field Ornithology

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“…Grass Wrens are year‐round territorial, predominantly socially monogamous (Llambías et al . 2018, Zarco & Llambías 2018, Fujikawa & Tubelis 2020) with moderate rates of extra‐pair fertilizations (Arrieta et al . 2022).…”

Section: Methodsmentioning

confidence: 99%

“…The Grass Wren is a small (c. 9 g), insectivorous, grassland specialist, broadly distributed throughout South America (Zarco & Llambías 2018, Remsen Jr. et al 2021. Grass Wrens are year-round territorial, predominantly socially monogamous (Llambías et al 2018, Zarco & Llambías 2018, Fujikawa & Tubelis 2020 with moderate rates of extra-pair fertilizations (Arrieta et al 2022). Nests are dome-shaped structures, constructed with grass stems, leaves and inflorescences (Zarco & Llambías 2018, Llambías et al 2020.…”

Section: Study Speciesmentioning

confidence: 99%

Female Grass Wrens adjust brooding effort according to ambient temperature, male feeding contribution and nest placement

Jefferies

Mendoza

Llambías

2022

Ibis

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The keystone of life‐history evolution theory proposes a trade‐off between current reproductive effort and future survival. Brooding is an essential and often overlooked component of parental behaviour of altricial birds intended to transfer heat to nestlings. Brooding under challenging environmental conditions can be energetically demanding and may adversely affect adult survival and future reproduction. We provide the first detailed description of the brooding behaviour of a south temperate grassland specialist: the Grass Wren Cistothorus platensis. In Grass Wrens, both sexes collaborate in parental care; however, only females brood the nestlings. We examined the relationship of ambient temperature, male feeding contribution, nestling age, nest size and nest placement in determining brooding behaviour. Additionally, we evaluated the effects of brooding behaviour on nestling body condition near fledging and female apparent survival. Brooding effort decreased with nestling age. Females increased their brooding effort at low ambient temperature and when males delivered more food. At lower ambient temperatures, females increased brooding effort in nests placed further from plant edge, with taller plant heights and well‐concealed substrates. However, there was no relationship between brooding effort and nest size. Neither female investment in brooding nor the number of nestlings produced per female was associated with nestling body condition near fledging or female annual apparent survival. Our results identify several factors that shape brooding behaviour in this south temperate passerine, suggesting that females favour nestling thermal conditions under adverse weather conditions.

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“…In this study, we describe the genetic mating system of a south temperate grassland specialist, the grass wren Cistothorus platensis . The grass wren is a socially monogamous passerine distributed from Cape Horn to Mesoamerica (Zarco and Llambías 2018, Llambías et al 2019a, Fujikawa and Tubelis 2020, Remsen et al 2021). Until recently it was considered conspecific with the largely migratory sedge wren Cistothorus stellaris of North America (Chesser et al 2021), making the grass wren an excellent model for future comparisons between tropical and temperate populations.…”

Section: Introductionmentioning

confidence: 99%

Local male breeding density affects extra‐pair paternity in a south temperate population of grass wrensCistothorus platensis

Arrieta

Campagna

Mahler

et al. 2022

Journal of Avian Biology

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Demographic factors can affect the frequency of extra‐pair paternity (EPP) in birds, as the distribution and availability of potential mates in both space and time influence the rate of encounters between females and males. Over three breeding seasons, we intensively studied the breeding system of a south temperate population of grass wrens Cistothorus platensis by genotyping 73 broods (319 nestlings) and estimating EPP rates for those broods. Using five different radii (80, 160, 240, 320 and 400 m) around each nest with assigned paternity, we examined the effects of local breeding synchrony, male breeding density and adult sex ratio (ASR) on the EPP rate. The majority of extra‐pair offspring (~80%) were sired by neighboring males. Neither local breeding synchrony nor ASR consistently explained the EPP rate variation as their effects were only statistically significant within 320 and 400 m. However, the EPP rate increased as the local male breeding density increased within every radius category, strongly suggesting that neighboring male abundance might play an important role in the extra‐pair mating behavior in this species. Our study also highlights the relevance of using a local scale approach when studying mating behavior.

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Área de vida de Cistothorus platensis (Aves: Troglodytidae) no Cerrado brasileiro

Cited by 3 publications

References 35 publications

Structure and organization of songs of south‐temperate Grass Wrens ( Cistothorus platensis )

Structure and organization of songs of south‐temperate Grass Wrens ( Cistothorus platensis )

Female Grass Wrens adjust brooding effort according to ambient temperature, male feeding contribution and nest placement

Local male breeding density affects extra‐pair paternity in a south temperate population of grass wrensCistothorus platensis

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